Plasmodium, the apicomplexan that causes malaria, enters the human bloodstream through the bite of which parasitic protozoan?

Explanation

The female Anopheles mosquito is the correct answer because it acts as the vector for Plasmodium, the parasite that causes malaria. When the mosquito bites a human, it transmits the parasite into the bloodstream. The other options, Amoeba, Radiolarians, and Forams, are different types of protists that do not play a role in malaria transmission. Amoebas are known for causing diseases like amoebic dysentery, while Radiolarians and Forams are primarily marine organisms with no connection to malaria.